Sand-valve mechanism.



No. 896,968. I PATENTED AUG. 2.5, 1908.

. DQT. BARNETT.

SAND VALVE MECHANISM.

APPLICATION FILED FEB. 24, 1908.

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' D. T. BARNETT.

SAND VALVE MECHANISM.

APPLICATION FILED FEB. 24, 1908.

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ATTORNEY THE NORRIS PETERS 0a.. wAsulgc'r oN. nv c.

UNITED STATES PATENT OFFICE.

DAVID T. BARNETT, OF CINCINNATI, OHIO.

SAND-VALVE MECHANISM.

Application filed February 24, 1908.

T all whom it may concern:

Be it known that I, DAVID T. BARNETT, a citizen of .the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented new and useful Improvements in Sand-Valve Mechanisms, of which the following is a specification.

This invention relates to new and useful improvements in sand valve mechanisms,

which may be applied to any conveyance or motor vehicle traveling upon track rails, such as locomotive steam engines. Heretofore these devices have generally been placed in the sand bin, and hence have been subject to frequent clogging and in such devices their operation has been impaired, due to the fact that some of the sands weight had to be acted against before the sand valve could be opened. They had no alternative means of operation, and if the means designed to operate them failed, the sand valve mechanism was out of commission.

The object of this invention is to provide a sand valve mechanism which may be placed wholly without the sand bin, in the line of the pipe leading from the bin to the tracks; is ordinarily operated by a fluid under pressure and when the fluid pressure is cut off purposely or accidentally, is capable of being operated by other means. Furthermore to provide such mechanism that no part of the weight of the sand will be acted against by the operation of the device; and to construct the entire device in such a manner as not to tend to stop the flow of sand in the pipe.

The particular embodiment of my invention selected for illustration, is designed for use on a locomotive steam engine.

Figure 1 is a full section of the entire device, taken axially. Fig. 2 is a plan view of one of the spiders which aid in supporting the operating mechanism. Fig. 3 is a plan view of a detail of the hand operated mechanism, viz: the yoke, the levers pivoted to it, and a connecting link.

Referring to the drawings, A, A is the main casing bolted together through lugs e by bolts a. Both parts of the casing A and A have threads o and a at their extremities to receive the threaded portions of the pipes or their unions leading from the sand. bin to the track. The sand enters the open ing a and passes out the opening a The lower part of the casing A embraces near its bottom a conical shaped interior surface a whose lower portion serves as a Specification of Letters Patent.

Patented Aug. 25, 1908.

Serial No. 417,361.

made by the ordinary piston rings 6 or their equivalent. Threaded to a central projection on the bottom of cylinder O is valve guide 0, which is pierced by rod 1) and has a countersunk recess in which valve 5 operates and is guided. Valve b and the guide are so formed as to make the least possible resistance to the sand in the surrounding conical space of the shell and exclude the same from the space in the guide 0. Packing box 0 permlts a fluid tight fit between piston rod 6, the projection on the bottom of cylinder 0 and valve guide 0. An inlet a in casing member A connects with the actuating fluid reservoir, and is connected to the inlet 0 at the bottom of cylinder 0 by a tube threaded in inlets a and 0 If the mechanism is adjusted correctly, the bottom of the piston B is flush with or above the top of inlet 0 when the valve is seated.

The head (2 of cylinder 0 is pierced by pis ton rod 6 and affords an annular space for the operation of spring 5 which is confined between the head and piston and constantly produces downward pressure on the piston B; said pressure being transmitted through rod 1) and valve 12 to the valve seat.

Cylinder head 0 cap D and the cylinder C are held together by bolts (1, extending through. lugs 0 c, and d Cap D has a conical or other suitably shaped top, the purpose of which is to divert the sand into the openings of the spiders. The sides and top of the cap D and the top of the cylinder head 0 form a chamber into which piston rod 6 extends from the cylinder proper. At the end of said rod b is a nut 5 either fastened to or integral with the same. Just below said nut b is a plate I) fixed to rod 6 and contacting with levers e pivoted to plate I) by means of pin e which pierces and operates in a lug integral with or fastened to the plate, said lug shown in a dotted line in the drawing. Lever e is also pivoted to a slotted part or yoke e which is slidably pierced by rod 6 Aperture (t in the casing A is connected to aperture d in the cap 1) by. means of a threaded tube 6 Link E, which may or may not connect to any system of lovers, is longitudinally adjustable within tube 6 is threaded in the slottedpart or yoke 6 and provides for operation of the valve without fluid pressure, and entirely independent of the piston. Notches a and a in the casing A and A and notches c and d in the central mechanism receive spiders F and F respectively, which holds said central mechanism rigidly in position.

. ity would be suflicient, unless the pipe leading from the sand valve mechanism to the track was badly arranged or contained some acute bends.

The 0 eration of the device is as follows When t e valve is desired to be unseated and sand allowed to be scattered over the track, air under pressure or a fluid of like properties is admitted to the aperture a by means of a valve in the pipe line between the fluid reservoir and said aperture, (said valve and pipe line not shown in the drawings). The fluid then passes through a tube, which connects aperture a and 0 into aperture 0 and raises piston B acting against the force afforded by spring I), said piston carrying with it rod Z) and valve b and unseating the same. Said valve sheaths in the counter bore of the valve guide 0. Sand is now free to flow, due to the action of gravity, out of aperture a through the pipe to the track, said ipe or its union belng threaded in threa s 00''. If a by-pass is embraced by the rod (2 and valve 6 part of the fluid passes through it and out aperture a to the track, entraining the sand. To sto the flow of the sand, thefluid is prevente from entering aperture a by closing the valve in the pipe line between the fluid reservoir and aperture a. When this is accomplished, there is no pressure on the under side of piston B and spring 1) free to act, exerts pressure on the top of the piston, which forces the same downward. This motion is transmitted through rod 1) to the valve (2 which is seated, and held firmly on its seat, due to the pressure exerted on the piston by the spring. The

fluid which is left in the pipe to the reservoir,

between the auxiliary valve and the device, also that fluid which is in the device itself, flows through conduit b and clears the pipe after its auxiliary valve is closed. However, if the actuating fluidshould fail to raise the piston, due to some parts sticking, or if it is desired to operate the valve when the air is cut off, the piston could be raised by pulling outward on link E which would slide the slotted part or yoke e to which it connects. This movement of link E would cause lever e, which is pivoted to plate I) and yoke e to assume a more vertical position and raise plate I)", which would in turn raise the valve against the force of spring b the motion of plate I) being transmitted to nut b then through rod 11 piston B and rod b to the valve pro er.

It is o vious that any system of levers could be connected to link E, such as would give the desired motion to said link. Also it is obvious that the mechanisms operating the valve, namely the ones operating it by hand and by means of the fluid, operate absolutely independently of one another.

What I claim as my invention and desire to secure by Letters Patent of the United States, is z 1. A sand valve device embodying in combination a sand discharging conduit, a valve for controlling same, means for operating the valve normally by fluid pressure, and auxiliary means for operating same positively by hand for emergency purposes.

2. A sand controlling and discharging device embodying in combination (1) a casing constituting an integral part of the discharge conduit enlarged, (2) a lift valve controlling the lower orifice of the casing, (3) a smaller casing arranged concentrically within the first, (4) a valve stem extended axially within the inner casing, and, (5) manually operated mechanism contained wholly within the inner casing foroperating the valve.

3. In a device of the character described,

having an outer and inner casing concentrically 1 arranged and a valve controlling the lower orifice of the former with stem extended axially into the latter, a countersunk boss attached to the lower end of the inner casing embracing the valve and constituting a guide, socket and sand shield for the same.

' 4. A sand valve mechanism, having in combination a casing with an opening at the top to connect with the sand supply and another at the bottom for a sand exit, another casing within the first and free therefrom save by connections between the sides of both said casings, a valve controlled from said inner casing adapted to close the sand exit opening in the outer casing and a lever mechanism within the second-named casing for causing thevertical reciprocation of said valve.

5. A sand valve mechanism, having in combination a casing constituting an enlargement of the feed pipe, with an opening at the top to connect with the sand supply and another at the bottom for a sand exit, another casing within the first and free therefrom save by connections between the sides of both said casings, a valve controlled from said inner casin adapted to open the sand exit opening in the outer casing, both by fluid pressure and by positive mechanical means.

6. A sand valve mechanism, having in combination a casing with an opening at the top to connect withthe sand supply and another at the bottom for a sand exit, another casing within the first and free therefrom save as to connections between the sides of both said casings, a valve controlled from said inner casing adapted to open the sand exit opening in the outer casing by the action of fluid under pressure, and a guide for the valve into which said valve recedes when it is moved to uncover the sand exit.

7. A sand valve mechanism, having in combination a casing, constituting an enlargement of the feed pipe with an opening at the top to connect with the sand supply and another at the bottom for a sand exit; another casing within the first and free therefrom save by connections between the sides of both said casings, a valve controlled from said inner casing normally adapted to keep closed the sand exit opening in the outer casing and means for admitting fluid under pressure to raise the valve and means to afford the escape of a portion of said fluid through the sand exit to entrain the sand.

8. In combination with a sand valve mechanism, a valve guide threaded to a projection of the bottom of the cylinder and having a counterbore adapted to receive the valve.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

DAVID T. BARNETT. Witnesses:

JosEPH R. GARDNER, CARROLL H. RICHARDS. 

